#include "common.h"
#include <string>
#include <time.h>
#include <algorithm>
#include <stdint.h>
using namespace std;
std::string random_string(size_t length) {
	srand(1);
	auto randchar = []() -> char
	{
		const char charset[] =
			"0123456789"
			"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
			"abcdefghijklmnopqrstuvwxyz";
		const size_t max_index = (sizeof(charset) - 1);
		return charset[rand() % max_index];
	};
	std::string str(length, 0);
	std::generate_n(str.begin(), length, randchar);
	return str;
}
